I know nothing of chemistry/physics/tribology of motor oil.

What I think I know is that comparing your oil anayisis results ( samples ) over a period of time can tell you things like; increase in wear metals, coolant leaks, quality of oil.

What I had written were excerpts from articles about oil analysis which I had read a few years back. The question and answer post from redline was done this past friday.

TBN results seem like a really useful bit of info. I would be interested to now how these base results form KOH or who knows what else are used in the comparison to the oil samples.